function PrepareBodyMiddleware::__invoke

File

vendor/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php, line 29

Class

PrepareBodyMiddleware

Prepares requests that contain a body, adding the Content-Length, Content-Type, and Expect headers.

Namespace

GuzzleHttp

Code

public function __invoke(RequestInterface $request, array $options) : PromiseInterface {
    $fn = $this->nextHandler;
    // Don't do anything if the request has no body.
    if ($request->getBody()
        ->getSize() === 0) {
        return $fn($request, $options);
    }
    $modify = [];
    // Add a default content-type if possible.
    if (!$request->hasHeader('Content-Type')) {
        if ($uri = $request->getBody()
            ->getMetadata('uri')) {
            if (is_string($uri) && ($type = Psr7\MimeType::fromFilename($uri))) {
                $modify['set_headers']['Content-Type'] = $type;
            }
        }
    }
    // Add a default content-length or transfer-encoding header.
    if (!$request->hasHeader('Content-Length') && !$request->hasHeader('Transfer-Encoding')) {
        $size = $request->getBody()
            ->getSize();
        if ($size !== null) {
            $modify['set_headers']['Content-Length'] = $size;
        }
        else {
            $modify['set_headers']['Transfer-Encoding'] = 'chunked';
        }
    }
    // Add the expect header if needed.
    $this->addExpectHeader($request, $options, $modify);
    return $fn(Psr7\Utils::modifyRequest($request, $modify), $options);
}